Fluid Mechanics - Chemical Engineering Questions and Answers

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Viscosity of water at 40°C lies in the range of

1 x 10⁻³ to 2 x 10⁻³ kg/m.s

0.5 x 10⁻³ to 1 x 10⁻³ kg/m.s

1 to 2 kg/m.s

0.5 to 1 kg/m.s

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Which of the following conditions must be satisfied for lift force to be developed?

The body should be bluff body

The body should be stream lined

Circulation around the body is essentially required

The main stream velocity must approach the velocity of sound in that fluid medium

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Pipes having diameter 14 inches or more are designated by their

Outside diameter

Inside diameter

Schedule number

None of these

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For flow past a flat plate, if x is the distance along the plate in the direction of flow, the boundary layer thickness is proportional to

√x

1/√x

1/x

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Power requirement of fans having constant wheel diameter varies __________ fan speed.

As square of

Directly as

As cube of

None of these

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Which of the following equations applies to the fluid flow through a packed bed for very large Reynolds number?

Fanning equation

Blake-Pllummer equation

Hagen-Poiseulle equation

Kozney-Karman equation

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Major loss in sudden contraction in pipe flow is due to

Boundary friction

Flow contraction

Expansion of flow after sudden contraction

None of these

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The Prandtl pitot tube measures the

Velocity at a point in the flow

Pressure at a point

Average flow velocity

Pressure difference in pipe flow

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Pick out the correct statement.

Human blood is a Newtonion fluid

A Newtonion fluid obeys Newton's law of cooling

For a non-Newtonion fluid, a straight line passes through the origin in a plot between shear stress and shear gradient

Thin lubricating oil is an example of a non-Newtonion fluid